Opel ASTRA Owner's Manual page 244

242 Vehicle care
Sports tourer
1. On left-hand side, fold down the
blind and remove.
2. Remove cover on the respective
side.
3. Unscrew two plastic securing nuts
from the inside by hand.
4. Carefully withdraw tail light
assembly from recesses and
remove. Make sure that the cable
duct remains in position.
5. Detach wiring plug from bulb
carrier.
6. Remove the bulb holder by
turning anticlockwise and replace
the bulb by withdrawing or
pushing the bulb slightly into the
socket and rotating anticlockwise:
Tail lights (1 + 2)
Turn signal light (3)
Brake light (4)